Since the 7.80 update in trail mode, if at the beginning there is a slope+ the hrm go up very little, they stay between 80-100-120, or they go down, even having to stop because I can't breathe they don't go up, but if it's flat, it works correctly 160 -180 hrm.
I have to run flat to get it right and then do slope + and with the following updates the problem is not solved, I have already tried everything.
Does anyone have any solution?
Thank you,